XML 28 R50.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Impairment of Investment Securities - Schedule of Unrealized Losses and Estimated Fair Values (Detail) (USD $) | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Estimated Fair Value, Less Than 12 Months | $ 313,008,000 |  | $ 135,599,000 |
Gross Unrealized Losses Less Than 12 Months | (2,296,000) |  | (464,000) |
Estimated Fair Value, 12 Months or More | 24,487,000 |  | 23,350,000 |
Gross Unrealized Losses 12 Months or More | (26,566,000) |  | (28,496,000) |
Total Estimated Fair Value | 337,495,000 |  | 158,949,000 |
Total Gross Unrealized Losses | 28,862,000 |  | 28,960,000 |
Corporate Debt Securities [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Estimated Fair Value, Less Than 12 Months | 4,797,000 |  |  |
Gross Unrealized Losses Less Than 12 Months | (30,000) |  |  |
Estimated Fair Value, 12 Months or More | 0 |  |  |
Gross Unrealized Losses 12 Months or More | 0 |  |  |
Total Estimated Fair Value | 4,797,000 |  |  |
Total Gross Unrealized Losses | 30,000 |  |  |
Pooled Trust Preferred Collateralized Debt Obligations [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Estimated Fair Value, Less Than 12 Months | 0 |  | 0 |
Gross Unrealized Losses Less Than 12 Months | 0 |  | 0 |
Estimated Fair Value, 12 Months or More | 24,454,000 |  | 23,316,000 |
Gross Unrealized Losses 12 Months or More | (26,566,000) |  | (28,496,000) |
Total Estimated Fair Value | 24,454,000 |  | 23,316,000 |
Total Gross Unrealized Losses | 26,566,000 |  | 28,496,000 |
Obligations of U.S. Government Agencies [Member] | Mortgage Backed Securities - Residential [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Estimated Fair Value, Less Than 12 Months | 0 |  | 0 |
Gross Unrealized Losses Less Than 12 Months | 0 |  | 0 |
Estimated Fair Value, 12 Months or More | 13,000 |  | 13,000 |
Gross Unrealized Losses 12 Months or More | 0 | [1] | 0 | [1]
Total Estimated Fair Value | 13,000 |  | 13,000 |
Total Gross Unrealized Losses | 0 |  | 0 |
Obligations of U.S. Government-Sponsored Enterprises [Member] | Mortgage Backed Securities - Residential [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Estimated Fair Value, Less Than 12 Months | 248,747,000 |  | 76,296,000 |
Gross Unrealized Losses Less Than 12 Months | (2,153,000) |  | (392,000) |
Estimated Fair Value, 12 Months or More | 20,000 |  | 21,000 |
Gross Unrealized Losses 12 Months or More | 0 | [1] | 0 | [1]
Total Estimated Fair Value | 248,767,000 |  | 76,317,000 |
Total Gross Unrealized Losses | 2,153,000 |  | 392,000 |
Obligations of U.S. Government-Sponsored Enterprises [Member] | Other Government Sponsored Enterprises [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Estimated Fair Value, Less Than 12 Months | 59,464,000 |  | 59,303,000 |
Gross Unrealized Losses Less Than 12 Months | (113,000) |  | (72,000) |
Estimated Fair Value, 12 Months or More | 0 |  | 0 |
Gross Unrealized Losses 12 Months or More | 0 |  | 0 |
Total Estimated Fair Value | 59,464,000 |  | 59,303,000 |
Total Gross Unrealized Losses | $ 113,000 |  | $ 72,000 |
[1] | Gross unrealized losses related to these types of securities are less than $1 thousand.

X
- Definition Available-for-sale securities continuous unrealized income (loss) position less than twelve months aggregate gain (losses). + References No definition available. + Details
Name: | fcf_AvailableForSaleSecuritiesContinuousUnrealizedIncomeLossPositionLessThanTwelveMonthsAggregateGainLosses
Namespace Prefix: | fcf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for securities which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the excess of amortized cost basis over fair value of securities in a loss position and categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration